Ruddy
Duck, Oxyura jamaicensis

Ruddies are unusual among ducks in that the males are in
non-breeding plumage, above, for about half the year; in most ducks,
the bright male breeding plumage is present for the whole year except
for the female-like eclipse plumage briefly held after the breeding
season. The male non-breeding plumage lacks the dark stripe on the
cheek that is found on the female.

A
male Ruddy bubbling -- a behavior described by the US Fish and Wildlife
Service thus: "While attracting females or keeping other males away, a
male ruddy duck displays behavior known as 'bubbling'. The male
repeatedly slaps its bill against its chest, forcing air out of the
feathers and into the water. This produces the 'bubbling' effect."